The British government is telling citizens to keep calm and carry on after a terrifying mass stabbing on a train, which left 11 people wounded — two of whom are still fighting for their lives. “There’s no reason for the rest of us not to get on with our lives,” Defense Secretary John Healey said, describing the incident near Huntingdon, Cambridgeshire, as “isolated” in an  interview with Sky News  Sunday morning. Police claimed Sunday that “there is nothing to suggest” that the attack was